At around the 20 second mark it showed a wall hack kind of thing that let him see two guys who were around the corner. It didn't look like he had to go through any gay ass animation either, all he did was aim down sight and it gave him a sweep of the area. Pretty badass, I hope that isn't the only thing that counters Ghost in this game.

Also at the 1:15 mark it looks like he tried to melee with the butt of his pistol after killing him. There have been rumors that if you want to use your knife in this game you will have to have a perk in order to do it. Hopefully the melee is a two hit kill if you don't have the perk.

Then right after that he knifed somebody, but before he did it the game showed he had a knife equipped as he was running up to the guy he knifed.